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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "DHTNode.h"
#include <cstring>
#include "util.h"
#include "a2functional.h"
#include "bittorrent_helper.h"
#include "wallclock.h"
namespace aria2 {
DHTNode::DHTNode()
: port_(0), rtt_(0), condition_(0), lastContact_(Timer::zero())
{
generateID();
}
DHTNode::DHTNode(const unsigned char* id)
: port_(0), rtt_(0), condition_(1), lastContact_(Timer::zero())
{
memcpy(id_, id, DHT_ID_LENGTH);
}
DHTNode::~DHTNode() = default;
void DHTNode::generateID() { util::generateRandomKey(id_); }
bool DHTNode::operator==(const DHTNode& node) const
{
return memcmp(id_, node.id_, DHT_ID_LENGTH) == 0;
}
bool DHTNode::operator!=(const DHTNode& node) const { return !(*this == node); }
bool DHTNode::operator<(const DHTNode& node) const
{
for (size_t i = 0; i < DHT_ID_LENGTH; ++i) {
if (id_[i] > node.id_[i]) {
return false;
}
else if (id_[i] < node.id_[i]) {
return true;
}
}
return true;
}
bool DHTNode::isGood() const { return !isBad() && !isQuestionable(); }
constexpr int BAD_CONDITION = 5;
bool DHTNode::isBad() const { return condition_ >= BAD_CONDITION; }
bool DHTNode::isQuestionable() const
{
return !isBad() && lastContact_.difference(global::wallclock()) >=
DHT_NODE_CONTACT_INTERVAL;
}
void DHTNode::markGood() { condition_ = 0; }
void DHTNode::markBad() { condition_ = BAD_CONDITION; }
void DHTNode::updateLastContact() { lastContact_ = global::wallclock(); }
void DHTNode::timeout() { ++condition_; }
std::string DHTNode::toString() const
{
return fmt("DHTNode ID=%s, Host=%s(%u), Condition=%d, RTT=%ld",
util::toHex(id_, DHT_ID_LENGTH).c_str(), ipaddr_.c_str(), port_,
condition_, static_cast<long int>(rtt_.count()));
}
void DHTNode::setID(const unsigned char* id) { memcpy(id_, id, DHT_ID_LENGTH); }
void DHTNode::setIPAddress(const std::string& ipaddr) { ipaddr_ = ipaddr; }
} // namespace aria2
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